CN111286390B - Novel automobile engine lubricating oil containing nanoscale carbon-based solid additive and preparation method thereof - Google Patents

Novel automobile engine lubricating oil containing nanoscale carbon-based solid additive and preparation method thereof Download PDF

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CN111286390B
CN111286390B CN202010092356.8A CN202010092356A CN111286390B CN 111286390 B CN111286390 B CN 111286390B CN 202010092356 A CN202010092356 A CN 202010092356A CN 111286390 B CN111286390 B CN 111286390B
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lubricating oil
solid additive
automobile engine
carbon
engine lubricating
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CN111286390A (en
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岳�文
宫培轩
佘丁顺
田斌
黄海鹏
王艳艳
张绍筠
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Zhengzhou Research Institute of China University of Geosciences (Beijing)
China University of Geosciences Beijing
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China University of Geosciences Beijing
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/04—Elements
    • C10M2201/041—Carbon; Graphite; Carbon black
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
    • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
    • C10M2219/066—Thiocarbamic type compounds
    • C10M2219/068—Thiocarbamate metal salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/045—Metal containing thio derivatives

Abstract

The invention discloses novel automobile engine lubricating oil containing a nano-scale carbon-based solid additive and a preparation method thereof, and relates to the technical field of tribological materials. The preparation method of the lubricating oil comprises the steps of pre-grinding, blending of the solid additive and mixing. The lubricating oil prepared by the method improves the tribological performance of the existing basic lubricating oil and reduces the abrasion; meanwhile, the formula provided by the invention is composed of the nano-scale carbon-based solid additive, so that the environment is not polluted, the use of the traditional organic friction modifier molybdenum dialkyl dithiocarbamate can be reduced, the compounds such as sulfur, molybdenum, phosphorus and the like and ash content generated by decomposition during use are reduced, and the environment is effectively protected.

Description

Novel automobile engine lubricating oil containing nanoscale carbon-based solid additive and preparation method thereof
Technical Field
The invention relates to preparation of automobile engine lubricating oil, in particular to novel automobile engine lubricating oil containing a nano-scale carbon-based solid additive and a preparation method thereof.
Background
As the mechanical equipment in the mechanical industry and the transportation industry is updated and the severe working conditions such as high pressure, high temperature, high speed, low temperature, ultralow temperature and the like are generated successively, higher requirements on the tribological performance of the lubricant are provided. Lubricating oil commonly used for engine piston rings is prepared by base oil and liquid additives (traditional friction modifiers such as friction modifiers, extreme pressure antiwear agents and the like, cleaning dispersants and the like), such as molybdenum dialkyl dithiophosphate (MoDTC), phosphate ester and the like, wherein the friction modifiers are decomposed to generate compounds such as sulfur, molybdenum, phosphorus and the like and ash during use in the process of improving the friction performance, so that the environment is polluted; the friction improvement effect of the traditional lubricating oil cannot be broken through, and the lower friction coefficient and the lower wear rate become indexes of the new generation of lubricating oil.
Therefore, on the basis of ensuring and even improving the tribological performance, the use of the traditional additives can be reduced, which is of great significance.
Disclosure of Invention
The invention aims to provide a low-sulfur phosphorus-molybdenum lubricating oil which has better friction reducing and wear reducing effects and is more environment-friendly, aiming at two problems of the traditional automobile engine lubricating oil, and also provides a preparation method of the lubricating oil.
The invention is realized by the following technical scheme: the novel automobile engine lubricating oil containing the nanoscale carbon-based solid additive comprises base oil, the solid additive, a friction modifier and an extreme pressure antiwear agent, and consists of the following raw materials in percentage by mass: base oil PAO 499.7-99.84%, nano diamond 0.02-0.05%, onion carbon 0.02-0.05%, molybdenum dialkyl dithiocarbamate (MoDTC) 0.06-0.1%, and dithiophosphate (ZDDP) 0.06-0.1%.
The solid additive raw material of the automobile engine lubricating oil is preferably used analytically pure.
The particle size of the nano diamond for the solid additive is 5-10 nm, and the particle size of the onion carbon is 5-10 nm. The nano carbon particle raw material in the particle size range is beneficial to enhancing the dispersibility of the lubricating oil and improving the abrasion resistance.
The base oil poly-alpha-olefin PAO4 has the kinematic viscosity of 3.84mm at 100 DEG C2(ii)/s, viscosity index of 124, density (20 ℃) of 0.82 g/ml.
The molybdenum dialkyldithiocarbamate (MoDTC) for a friction modifier has a density (20 ℃) of 1.01g/ml, a Mo content of 10.0% and an S content of 11.0%. The addition of molybdenum dialkyl dithiocarbamate (MoDTC) can form a synergistic effect with the nano-diamond and the onion carbon, so that the friction coefficient is effectively reduced.
The dithiophosphate (ZDDP) for the extreme pressure antiwear agent has the density (20 ℃) of 1.13g/ml, the Zn content of 10.0%, the P content of 8% and the S content of 16.0%. The addition of dithiophosphate (ZDDP) can enhance the wear resistance of lubricating oil, and the ZDDP can generate synergistic effect with nanodiamond and onion carbon to effectively reduce wear.
The preparation method of the onion carbon comprises the following steps:
s1, placing the nano-diamond with the particle size of 5-10 nm into a graphite crucible, placing the graphite crucible into a quartz glass, covering a quartz glass cover, and placing the glass into a vacuum annealing furnace chamber;
s2, vacuumizing the cavity of the vacuum annealing furnace for 1-2 hours, starting heating for 1-2 hours to 1200 ℃, preserving heat for 1 hour, and cooling to room temperature and atmospheric environment to obtain the low-particle-size (5-10 nm) onion carbon special for the oil.
The preparation method of the automobile engine lubricating oil comprises the following steps:
s1, adding the nano-diamond and the onion carbon into petroleum ether, and carrying out ball milling mixing under the protection of nitrogen at the rotating speed of 30-35 r/min for 8-10 h;
s2, adding the pre-ground product into base oil PAO4, mixing, and uniformly processing in an ultrasonic oscillator for 1-2 hours;
s3, mixing molybdenum dialkyl dithiocarbamate with the product mixed in the step 2, uniformly treating the mixture in a magnetic stirrer for 1-2 hours, and uniformly treating the mixture in an ultrasonic oscillator for 1-2 hours;
s4, mixing the dithiophosphate with the product mixed in the step 3, uniformly treating the mixture in a magnetic stirrer for 1 hour, and uniformly treating the mixture in an ultrasonic oscillator for 1-2 hours to obtain the compound.
Preferably, the nanodiamond, the onion carbon and the petroleum ether are mixed in the step 1 in a mass ratio of 1:1: 1.5-2.
Preferably, the solid additive mixture described in step 2 is blended with the base oil PAO4 in a ratio of 1: 1998-2000 mass ratio.
Preferably, the molybdenum dialkyldithiocarbamate described in step 3 is blended with the mixed oil in a ratio of 1: 998-1000 by mass ratio.
Preferably, the dithiophosphate is mixed with the mixed oil in the ratio of 1: 998-1000 by mass ratio.
The invention has the advantages that:
(1) according to the lubricating oil special for the automobile engine prepared by the solid additive formula, an Mo-S bond in a MoDTC molecule of a friction improver undergoes electron transfer to generate three free radicals, two dithiocarbamic acid free radicals and one molybdenum oxysulfide free radical, wherein the molybdenum oxysulfide free radical can generate MoS in the friction process2The sulfur element can generate a catalytic action in the process of friction with the nano-diamond to promote the nano-diamond to be converted into the onion carbon, and the carbon has a common friction reducing action with the onion carbon in the original formula, so that the lubricating oil has better tribological performance, lower friction coefficient and smaller wear volume compared with the traditional lubricating oil; molybdenum oxysulfide free radicals generated by MoDTC play a role in promoting the thermal decomposition of ZDDP, and accelerate the action effect of the extreme pressure antiwear agent.
(2) According to the lubricating oil special for the automobile engine prepared by the solid additive formula, a P-S, P-S bond in an extreme pressure antiwear agent ZDDP molecule is decomposed by heating to break a chain, S and Fe react to generate a FeS reaction film, and the lubricating oil has a certain antiwear effect. In the process of friction with the nano-diamond, the sulfur element can generate a catalytic action to promote the nano-diamond to be converted into the onion carbon; phosphorodithioate generated by ZDDP can be grafted on the surface of the nano-diamond, so that the dispersibility of the nano-diamond in oil is greatly improved; the zinc element generated by the ZDDP decomposition can promote the thermal decomposition process of MoDTCPromoting MoS by chemical reactivity of2The effect of the friction modifier is accelerated.
(3) According to the lubricating oil special for the automobile engine prepared by the solid additive formula, the addition of the nano-diamond can generate a ball effect, reduce the initial running-in time in the boundary friction process, reduce the friction coefficient and improve the film forming speed of a friction reaction film generated by the thermal decomposition of MoDTC and ZDDP in the friction process; the nano diamond is an initial component in the process of converting to the onion carbon under the catalytic action of sulfur, and the tribological performance of the oil product can be improved.
(4) According to the lubricating oil special for the automobile engine prepared by the solid additive formula, the addition of the onion carbon and the nano-diamond generate a synergistic effect, a graphite carbon source is provided for the conversion of the nano-diamond in the initial stage of friction, the catalytic conversion rate is accelerated, and the reduction of the friction coefficient is promoted; the amorphous carbon on the carbon surface of the onion plays a role in filling up a grinding crack furrow in boundary lubrication, so that the surface roughness is reduced, and the abrasion is reduced.
(5) In the formula of the product, the synergistic effect of MoDTC, ZDDP, onion carbon and nano-diamond enables the friction and wear reducing effect of any single additive to be better, and simultaneously reduces the addition of oil-soluble organic compounds (MoDTC and ZDDP) and reduces environmental pollution.
(6) The preparation method of the product uses Al in the pre-grinding process in the step one2O3In the ball milling process of the nano diamond and the onion carbon, Al2O3Al ions generated by ball milling can be adsorbed on the surface of the nano-diamond, so that static stability caused by ionic groups or adsorbed ions existing on the surface is generated, and the excellent dispersibility of the nano-diamond and the onion carbon in the oil product is improved; with Al2O3The grinding dust can be brought into an oil product in the amorphous carbon coating, and in the friction process, the core-shell structure coated with graphite can effectively reduce the running-in period, the friction coefficient and the wear rate.
(7) The preparation method of the product, which is a synthesis step of the onion carbon, has the characteristic of low particle size (5-10 nm) in the high-temperature vacuum annealing of 5-10 nm nano-diamond, so that the particle size of the nano-diamond and the particle size of the onion carbon are not different, and the synergistic effect generated in oil is more stable.
The specific embodiment of the novel automobile engine lubricating oil containing the nanoscale carbon-based solid additive comprises base oil, the solid additive, a friction modifier and an extreme pressure antiwear agent, wherein the automobile engine lubricating oil is prepared from the following raw materials in percentage by mass: base oil
499.7-99.84% of PAO, 0.02-0.05% of nanodiamond, 0.02-0.05% of onion carbon, 0.06-0.1% of molybdenum dialkyl dithiocarbamate (MoDTC) and 0.06-0.1% of dithiophosphate (ZDDP).
The solid additive raw material of the automobile engine lubricating oil is preferably used analytically pure.
The particle size of the nano diamond for the solid additive is 5-10 nm, and the particle size of the onion carbon is 5-10 nm.
The base oil poly-alpha-olefin PAO4 has the kinematic viscosity of 3.84mm at 100 DEG C2(ii)/s, viscosity index of 124, density (20 ℃) of 0.82 g/ml.
The molybdenum dialkyldithiocarbamate (MoDTC) for a friction modifier has a density (20 ℃) of 1.01g/ml, a Mo content of 10.0% and an S content of 11.0%. The addition of molybdenum dialkyl dithiocarbamate (MoDTC) can form a synergistic effect with the nano-diamond and the onion carbon, so that the friction coefficient is effectively reduced.
The dithiophosphate (ZDDP) for the extreme pressure antiwear agent has the density (20 ℃) of 1.13g/ml, the Zn content of 10.0%, the P content of 8% and the S content of 16.0%. The addition of dithiophosphate (ZDDP) can enhance the wear resistance of lubricating oil, and the ZDDP can generate synergistic effect with nanodiamond and onion carbon to effectively reduce wear.
The method for preparing the onion carbon added in the novel automobile engine lubricating oil containing the nano-scale carbon-based solid additive comprises the following steps:
s1, placing the nano-diamond with the particle size of 5-10 nm into a graphite crucible, placing the graphite crucible into a quartz glass, covering a quartz glass cover, and placing the glass into a vacuum annealing furnace chamber;
s2, vacuumizing the cavity of the vacuum annealing furnace for 1-2 hours, starting heating for 1-2 hours to 1200 ℃, preserving heat for 1 hour, and cooling to room temperature and atmospheric environment to obtain the low-particle-size (5-10 nm) onion carbon special for the oil.
The preparation method of the automobile engine lubricating oil comprises the following steps:
s1, adding the nano-diamond and the onion carbon into petroleum ether, and carrying out ball milling mixing under the protection of nitrogen at the rotating speed of 30-35 r/min for 8-10 h;
s2, adding the pre-ground product into base oil PAO4, mixing, and uniformly processing in an ultrasonic oscillator for 1-2 hours;
s3, mixing molybdenum dialkyl dithiocarbamate with the product mixed in the step 2, uniformly treating the mixture in a magnetic stirrer for 1-2 hours, and uniformly treating the mixture in an ultrasonic oscillator for 1-2 hours;
s4, mixing the dithiophosphate with the product mixed in the step 3, uniformly treating the mixture in a magnetic stirrer for 1 hour, and uniformly treating the mixture in an ultrasonic oscillator for 1-2 hours to obtain the compound.
Preferably, the nanodiamond, the onion carbon and the petroleum ether are mixed in the step 1 in a mass ratio of 1:1: 1.5-2.
Preferably, the solid additive mixture described in step 2 is blended with the base oil PAO4 in a ratio of 1: 1998-2000 mass ratio.
Preferably, the molybdenum dialkyldithiocarbamate described in step 3 is blended with the mixed oil in a ratio of 1: 998-1000 by mass ratio.
Preferably, the dithiophosphate is mixed with the mixed oil in the ratio of 1: 998-1000 by mass ratio.
The process of the present invention is further illustrated by the following preferred examples, but the scope of the invention is not limited thereto.
Example 1A novel automotive Engine lubricating oil containing a Nano-sized carbon-based solid additive, comprising a base oil, a solid additive, a Friction modifierThe lubricating oil for the automobile engine comprises the following raw materials in percentage by mass: kinematic viscosity 3.84mm at 100 DEG C2(ii)/s, viscosity index of 124, 2 density (20 ℃) of 0.82g/ml base oil PAO 499.7%; 0.05% of nano diamond with the particle size of 10nm and 0.05% of onion carbon with the particle size of 10 nm; 0.1% of molybdenum dialkyl dithiocarbamate with the density of 1.01g/ml, the Mo content of 10.0% and the S content of 11.0% at the temperature of 20 ℃; the density at 20 ℃ is 1.13g/ml, the Zn content is 10.0%, the P content is 8%, and the S content is 0.1% of dithiophosphate with 16.0%.
The preparation method of the onion carbon comprises the following steps:
step 1, putting nano diamond with the particle size of 10nm into a graphite crucible, putting the graphite crucible into a quartz glass, covering a quartz glass cover, and putting the glass into a vacuum annealing furnace chamber;
and 2, vacuumizing the cavity of the vacuum annealing furnace for 1-2 hours, starting heating for 1-2 hours to 1200 ℃, preserving heat for 1 hour, and cooling to room temperature and atmospheric environment to obtain the onion carbon with the particle size of 10 nm.
The preparation method of the automobile engine lubricating oil comprises the following steps:
step 1, mixing the nanodiamond, the onion carbon and the petroleum ether in a mass ratio of 1:1: 1.5-2, performing ball milling mixing under the protection of nitrogen (1 atmosphere pressure), and using Al with the diameter of phi 4-phi 12mm2O3The rotation speed of the grinding balls is 30-35 r/min, and the ball milling time is 8-10 h;
step 2, adding the pre-ground product into base oil polyalphaolefin (PAO4) for mixing, and mixing the pre-ground product and the base oil polyalphaolefin (PAO4) according to the ratio of 1: 1998-2000, and uniformly treating for 1-2 hours in an ultrasonic oscillator;
and 3, mixing molybdenum dialkyl dithiocarbamate with the mixed oil obtained in the step 2 in a ratio of 1: 998-1000, uniformly treating in a magnetic stirrer for 1-2 h, and uniformly treating in an ultrasonic oscillator for 1-2 h;
and 4, mixing the dithiophosphate with the mixed oil obtained in the step 3 in a ratio of 1: 998 in a mass ratio. Uniformly treating the mixture in a magnetic stirrer for 1-2 h, and uniformly treating the mixture in an ultrasonic oscillator for 1-2 h to obtain the product.
Embodiment 2 a novel automobile engine lubricating oil containing a nanoscale carbon-based solid additive, which comprises base oil, a solid additive, a friction modifier and an extreme pressure antiwear agent, wherein the automobile engine lubricating oil is composed of the following raw materials in percentage by mass: kinematic viscosity 3.84mm at 100 DEG C2(ii)/s, viscosity index of 124, 2 density (20 ℃) of 0.82g/ml base oil PAO 499.84%; 0.02% of nano diamond with the grain diameter of 10nm and 0.02% of onion carbon with the grain diameter of 10 nm; density of 1.01g/ml, 20 deg.C
Molybdenum dialkyl dithiocarbamate with Mo content of 10.0% and S content of 11.0% under the condition of 0.06%; the density at 20 ℃ is 1.13g/ml, the Zn content is 10.0 percent, the P content is 8 percent, and the S content is 0.06 percent of dithiophosphate with 16.0 percent.
The preparation method of the onion carbon comprises the following steps:
step 1, putting nano diamond with the particle size of 10nm into a graphite crucible, putting the graphite crucible into a quartz glass, covering a quartz glass cover, and putting the glass into a vacuum annealing furnace chamber;
and 2, vacuumizing the cavity of the vacuum annealing furnace for 1-2 hours, starting heating for 1-2 hours to 1200 ℃, preserving heat for 1 hour, and cooling to room temperature and atmospheric environment to obtain the onion carbon with the particle size of 10 nm.
The preparation method of the automobile engine lubricating oil comprises the following steps:
step 1, mixing the nanodiamond, the onion carbon and the petroleum ether in a mass ratio of 1:1: 1.5-2, performing ball milling mixing under the protection of nitrogen (1 atmosphere pressure), and using Al with the diameter of phi 4-phi 12mm2O3The rotation speed of the grinding balls is 30-35 r/min, and the ball milling time is 8-10 h;
step 2, adding the pre-ground product into base oil polyalphaolefin (PAO4) for mixing, and mixing the pre-ground product and the base oil polyalphaolefin (PAO4) according to the ratio of 1: 1998-2000, and uniformly treating for 1-2 hours in an ultrasonic oscillator;
and 3, mixing molybdenum dialkyl dithiocarbamate with the mixed oil obtained in the step 2 in a ratio of 1: 998-1000, uniformly treating in a magnetic stirrer for 1-2 h, and uniformly treating in an ultrasonic oscillator for 1-2 h;
and 4, mixing the dithiophosphate with the mixed oil obtained in the step 3 in a ratio of 1: 998 in a mass ratio. Uniformly treating the mixture in a magnetic stirrer for 1-2 h, and uniformly treating the mixture in an ultrasonic oscillator for 1-2 h to obtain the product.
Embodiment 3 a novel automobile engine lubricating oil containing a nanoscale carbon-based solid additive comprises base oil, a solid additive, a friction modifier and an extreme pressure antiwear agent, wherein the automobile engine lubricating oil is composed of the following raw materials in percentage by mass: kinematic viscosity 3.84mm at 100 DEG C2(ii)/s, viscosity index of 124, 2 density (20 ℃) of 0.82g/ml base oil PAO 499.76%; 0.04% of nano diamond with the particle size of 10nm and 0.04% of onion carbon with the particle size of 10 nm; 0.08% of molybdenum dialkyl dithiocarbamate with the density of 1.01g/ml, the Mo content of 10.0% and the S content of 11.0% at the temperature of 20 ℃; the density at 20 ℃ is 1.13g/ml, the Zn content is 10.0 percent, the P content is 8 percent, and the S content is 0.08 percent of dithiophosphate with 16.0 percent.
The preparation method of the onion carbon comprises the following steps:
step 1, putting nano diamond with the particle size of 10nm into a graphite crucible, putting the graphite crucible into a quartz glass, covering a quartz glass cover, and putting the glass into a vacuum annealing furnace chamber;
and 2, vacuumizing the cavity of the vacuum annealing furnace for 1-2 hours, starting heating for 1-2 hours to 1200 ℃, preserving heat for 1 hour, and cooling to room temperature and atmospheric environment to obtain the onion carbon with the particle size of 10 nm.
The preparation method of the automobile engine lubricating oil comprises the following steps:
step 1, mixing the nanodiamond, the onion carbon and the petroleum ether in a mass ratio of 1:1: 1.5-2, performing ball milling mixing under the protection of nitrogen (1 atmosphere pressure), and using Al with the diameter of phi 4-phi 12mm2O3The rotation speed of the grinding balls is 30-35 r/min, and the ball milling time is 8-10 h;
step 2, adding the pre-ground product into base oil polyalphaolefin (PAO4) for mixing, and mixing the pre-ground product and the base oil polyalphaolefin (PAO4) according to the ratio of 1: 1998-2000, and uniformly treating for 1-2 hours in an ultrasonic oscillator;
and 3, mixing molybdenum dialkyl dithiocarbamate with the mixed oil obtained in the step 2 in a ratio of 1: 998-1000, uniformly treating in a magnetic stirrer for 1-2 h, and uniformly treating in an ultrasonic oscillator for 1-2 h;
and 4, mixing the dithiophosphate with the mixed oil obtained in the step 3 in a ratio of 1: 998 in a mass ratio. Uniformly treating the mixture in a magnetic stirrer for 1-2 h, and uniformly treating the mixture in an ultrasonic oscillator for 1-2 h to obtain the product.

Claims (10)

1. A novel automobile engine lubricating oil containing a nanoscale carbon-based solid additive comprises base oil, a solid additive, a friction modifier and an extreme pressure antiwear agent, and is characterized in that: the automobile engine lubricating oil consists of the following raw materials in percentage by mass: 99.7-98.4% of base oil poly-alpha olefin, 0.02-0.05% of nano diamond, 0.02-0.05% of onion carbon, 0.06-0.1% of molybdenum dialkyl dithiocarbamate and 0.06-0.1% of dithiophosphate.
2. The novel automobile engine lubricating oil containing the nanoscale carbon-based solid additive as claimed in claim 1, wherein: a base oil polyalphaolefin having a kinematic viscosity of 3.84mm at 100 ℃2The viscosity index is 124 per second, and the density at 20 ℃ is 0.82 g/ml.
3. The novel automobile engine lubricating oil containing the nanoscale carbon-based solid additive as claimed in claim 1, wherein: the particle size of the nano diamond used for the solid additive is 5-10 nm, and the particle size of the onion carbon is 5-10 nm.
4. The novel automobile engine lubricating oil containing the nanoscale carbon-based solid additive as claimed in claim 1, wherein: the molybdenum dialkyldithiocarbamate used for the friction modifier has a density of 1.01g/ml at 20 ℃, a Mo content of 10.0% and an S content of 11.0%.
5. The novel automobile engine lubricating oil containing the nanoscale carbon-based solid additive as claimed in claim 1, wherein: the dithiophosphate used for the extreme pressure antiwear agent has the density of 1.13g/ml at 20 ℃, the Zn content of 10.0%, the P content of 8% and the S content of 16.0%.
6. The method for preparing the novel automobile engine lubricating oil containing the nano-scale carbon-based solid additive according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
s1, placing the nano-diamond with the particle size of 5-10 nm into a graphite crucible, placing the graphite crucible into a quartz glass, covering a quartz glass cover, and placing the glass into a vacuum annealing furnace chamber;
s2, vacuumizing the cavity of the vacuum annealing furnace for 1-2 hours, starting heating for 1-2 hours to 1200 ℃, preserving heat for 1 hour, and cooling to room temperature and atmospheric environment to obtain the onion carbon with the particle size of 5-10 nm specially used for the oil product.
7. The method for preparing the novel automobile engine lubricating oil containing the nano-scale carbon-based solid additive according to claim 6,
the method is characterized in that: also comprises the following steps:
s1, the nanodiamond and the onion carbon as in claim 3 are added into petroleum ether and ball-milled and mixed under the protection of 1 atmosphere of nitrogen, and the diameter of the ball is 4-12 mm Al2O3The rotating speed is 30-35 r/min, and the ball milling time is 8-10 h;
s2, adding the product pre-ground in the step 1 into the base oil polyalphaolefin of claim 2, mixing, and uniformly treating in an ultrasonic oscillator for 1-2 hours;
s3, mixing the molybdenum dialkyl dithiocarbamate described in claim 4 with the product obtained after the mixing in the step 2,
uniformly treating the mixture in a magnetic stirrer for 1-2 h, and uniformly treating the mixture in an ultrasonic oscillator for 1-2 h;
s4, mixing the dithiophosphate of claim 5 with the product obtained by mixing in the step 3, uniformly treating the mixture in a magnetic stirrer for 1-2 hours, and uniformly treating the mixture in an ultrasonic oscillator for 1-2 hours.
8. The method for preparing the novel automobile engine lubricating oil containing the nanoscale carbon-based solid additive according to claim 7, characterized in that: and in the step 1, the nano-diamond, the onion carbon and the petroleum ether are mixed according to the mass ratio of 1:1: 1.5-2.
9. The method for preparing the novel automobile engine lubricating oil containing the nanoscale carbon-based solid additive according to claim 7, characterized in that: the pre-milled product in step 2 was blended with base oil polyalphaolefin in a ratio of 1: 1998-2000 mass ratio.
10. The method for preparing the novel automobile engine lubricating oil containing the nanoscale carbon-based solid additive according to claim 7, characterized in that: mixing the molybdenum dialkyl dithiocarbamate obtained in the step 3 and the mixed oil obtained in the step 2 in a ratio of 1: 998-1000 mass ratio; the dithiophosphate in the step 4 and the mixed oil obtained in the step 3 are mixed in a ratio of 1: 998-1000 by mass ratio.
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